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3V LED Dimmer Circuit

The Circuit works with the basic precept of a Transistor. The Potentiometer creates a Voltage divider inside the circuit.

BeginnerFull instructions provided1 hour997
3V LED Dimmer Circuit

Things used in this project

Hardware components

BC547 NPN TRANSISTOR UTSOURCE
×1
5MM LED UTSOURCE
×1
10K RESISTOR UTSOURCE
×1
100K POTENTIOMETER UTSOURCE
×1

Hand tools and fabrication machines

SOLDERING IRON UTSOURCE
SOLDERING IRON STAND UTSOURCE
NOSE PLIERS UTSOURCE
FLUX UTSOURCE

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Schematics

Step 1

First, you will want an NPN Transistor. Here I am the usage of BC548 Transistor. You can also use every other NPN Transistor as well. I bent the three Legs of the Transistor. Then I even have Pre-tin the wires for higher soldering. In the picture, you can see the Pin output.

Step 2

Now you will need a 100k Potentiometer. Connect the Transistor’s Emitter Pin with the Potentiometer nook Pin.

Step 3

Connect LED with the circuit. Connect LED +ve with Potentiometer. And join LED -ve with the collector of the Transistor. 

Step 4

Here are the connection points of the circuit. The voltage might be according to the load. Here I will connect 3v LED so I decided to hook up with 3.7v 18650 Battery. if you have 12v masses then you can connect 12v as well.

Step 5

So, Lets Test the LED Dimmer Circuit.

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Creative creator

Creative creator

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